EUVD-2026-72392

league/commonmark versions = 2.0.0 and 2.8.4 patched in 2.9.0 contain a denial of service vulnerability in UniqueSlugNormalizer::normalize, which restarts its numeric-suffix search from 1 on every slug collision, resulting in OK^2 time complexity for K headings that collapse to the same base slug...

GHSA-MH25-X5HQ-WRQP league/commonmark: Denial of service via colliding heading slugs

Impact UniqueSlugNormalizer::normalize makes each slug document-unique by searching for an unused numeric suffix, but restarts that search from 1 on every collision. The k-th heading that collapses to the same base slug performs k−1 array lookups, so K colliding slugs cost Σk−1 = OK². An attacker...

Inefficient Algorithmic Complexity

Overview league/commonmark is a PHP-based Markdown parser which supports the full CommonMark spec. It is based on the CommonMark JS reference implementation. Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the UniqueSlugNormalizer::normalize process. An...

PT-2026-25425

OpenClaw supports Discord allowlists using either user IDs or names/tags. Name/tag matching depends on slug normalization, so different user tags can collide to the same slug and unintentionally satisfy a name-based allowlist entry. Affected Packages / Versions - Package: openclaw npm - Affected...